Knife for slicing machines



Patented Aug. 12, 1930 P'ATEY'NTOFFICE WILLIAM J'. oA reELIl, or INDIANAPOLIS, INDIANA',(ASSIGNOR- T AMERICANTSIIIC- ING MACHINE COMPANY, OE'CHIGAGO, ILLINOIS, A CORPORATION or NEW' YORK I KNIFE roR SLICING MACHINES Application filed July 12,

object, ofmy-inventioni's to provide an improved form of knife'and particularly a form of knifewhichis adapted to' deliver the slice j free from and out of contactwith'the adjacentfportions of the/guarding and housing Fstructure. Other objects will appear from fti'rneto time in 'an'dlclanns.

the course 'ozfthe specification I illustrate myinventionmoreorlessdiaings, wherein I grammatically in" t YFigure is aplan view with parts in seca sa a r l Figures is a' seetion on theline-22 of s r ingtbol;

fiFigiireZi;

throughout the specification 'and drawings.

Figurefi is a" "removed;

Figure I a m y erspective view with parts Figure 4 is a perspe ctiveviewof a remov- Figure Like parts are r indicated by likesymbols V R'eferring to the drawings, A generally indicatesthebaseorframe of the device which maybe supported for example upongthe supporting orgroundengaging studsA m B generally; indicates a motor with-the I motor shaftB andthe drivepulley B? about which passes the belt B (l 'indicates a l nife1nounted upon the fe shaft C G indicates afpulleyl associated with knife and "knife shaft adapted tobe outer races C G with the correspondingin- "ner races 0- C? associated with 'the knlfe driven from the 'motorthrough the belt 13 C ig'enerallyindicates a guard or"housing drical cavity so formed are positioned the 1 C is a spacing'sleeve which may be held in position as by' engagement with the hollow pin' Q which formsthe double function of he accompanying draw- 1929. I serial m5. 377,843,

ing assembly so described maybe drawn upagainst the ledge o es by't'hehutsCfiOn the reduced screw threaded portion C of f the shaft C The pulley C is heldin position against' the expanded end or head C of the knifeshaftyas by the screws G theheads ofjwhich penetrate apertures C in the knifev and prevent rotation of the knife in relation to the shaft. C is any suitablescrew where- I bythe knife may be held against axialmove merit away from the end of the shaft. vThe 1 l knife is" recessed at the front'as at C l'and at the reafr as at C3, the recessesbeing of like radius. p

is a guard'or skirt Dpne'portion of which" penetrates ,as at D the rear recess C of the knife, {It Wlll be seen, as in Figured, that this portion D is generally arcuate in jcrosssection. Therear face of the knife between the depression C and'the cutting edge,:;is arouately formed as at B2 the arc orcurve being preferably of such contour asto tend to throiw. or dellver thei sli'ces'out of-contact rwith theguard portion D. This result may bepbtained by having D arcuate in cross ,section' but of anlarc of lesser 1 radius than the arc of the portion D. Howeverr-lndo- I lot wishj to be limited to any particular are orcont'oun. e The front face of theknife isprotected as, by the guard'plateEone'edgeiof which enters as at E4 the forward recessC of the knife:

7 Asis illustrated in Figuresl and 5itheaxis 'of theknife is tilted tobring the cutting edge of theknife forwardly'into the plane of the guardplate The guard plate isi'remo'vableLlas {shown in Figure 2, and may for ex amplebe mounted against adjusting abut-' inents E againstwhich it is held for example byisecuring screws The removable housing cover E extends over the hub portion sition for example by. the headed securing or, G indicate tracks, time u on, the" Associated with the p ortionC of the frame of knife and guard plate, being held in po- The use and operation of mymvention are base or frame, upon which is slidably mounted any suitable work support G the details of which do not of themselves form part of the present invention. Thesupport includes an angularly adjustable work engaging table G. a y

H indicates a gauge plate which is mounted upon any suitable supporting structure H, for movement toward and away from the cutting plane, whereby the thickness of. the slices may be ulated. Associated with the arcuate edge H of the auge plate is the uard H which protects t e rear of the kni e. Preferably the guard H substantially overlaps the rear face of the knife and may be arcuute in cross-section. Asshown in Figures 1 and 5, although it does overlap the W 85 Qf-the knife it is varied more or outwardly therefrom to increase the clearance between the rear face of the knife and theguard progressivel inwardly from gutting edge toward t e center of the a 'I fonn the knife in order to permit its easy removal which may be effected for example with the tools herein shown. The knife being forwardly cupped as shown in Figures 1, 2 and 5 I provide a tool I, as shown in Figure the: offset end portion 1 apertured fiatlito receive the head of the screwC". The Man portion I penmitseasy access of the tool to the screw C". In order to grasp theknife and prevent its rotation when the I is rotated I provide an additional @001 generally indicated as I and a; central elm portion generally indicated as. I.

Mounted on this centralportion arethe knife lqaging and penetrating studs I I, headed as v19, which penetrate apertures I in the face of the knife.

- b will be neaiized that whereas .IyhflVG .doacoibed and shown a practical and operatirve device, nevertheless manychanges might be made in the size, shape, number and dis position of parts without departing from the y of my invention. I therefore wish my rizption and drawings to be taken as in 'aaibmhd sense litl ustrat'ive and. diagrammatic ratherthan as limiting me to myspccificshowing.

7 as follows:

1 illustrate a form of knife which is not .mly particularly efficient in use but which t) *Iike to the interior of the device is substan is easy to remove. The knife is recessed at front and rear, to receive the adjacent guard members, including the rear bell shaped fmember D land the forward guard plate E.

lsbhowniin Eigurel, the curve or arcuate surface D of the knife 0 is formed to direct the slices out of contact with the guard portion D of the frame or housing. The forward face of the knife as shown for example at D may be fiat or relatively flat, and may be opposed by any suitable scr hinders the ingress of grease, bits of meat and the like into the interior of the housin When it is desired to removetho e from the knife shaft the cover E and the guard plate E are removed, exposing the face of the knife. The operator then takes the tool I and places it in theposition in which it is shown in Figure 3, the aperture I receiving the head of the screw C". Inorderto flake easy the application of force to rotatpmd withdraw the screw C" the operator employ the tool I, the members 1' of wh'. penetrate the apertures I. If the opemtor holds the tool I againstrotation, androtates the tool I, the knife and knife shaft will be held stationar while the screw C" is beingunserewed. I heads of theta-ans C revent relative rotation of the knifeand kni e shaft, but do. not interfere with the axial withdrawal of the knife when: the screw C" has been removed. When thojicrewil ing means, for example the scraper DP, w ichiurther fromslipping off. The bearing and l i I mg means for the knife are shown inl rlure 2, the roller bearings for each end of theliniie shaft being mounted direetly within aperture C in the housing or frame being spaced or separated sleeve G t The position of the sleeve is controlled bytbehnllow lubricating pin 0?. L Note that the recesses (3 and C" amof like radius, as shown in Figures 1' 8 I find it desirable to form them of like gadius because by so doing, by advancing the recess (3 to the same radius as the -Q I provide room for a pulley of maximmsize.

In a typical exemplifieation of my demioethe runs at 17 50 R. P. M. and. there must be asatisitaetory reduction in apeodmn the motorandthe knife. In order reduce tendency of slippage the pul'le'yshonld have a diameter in excess, for example,-oi three inches. It is further desirable to shar en the bevel D of the knife. The surface D is arenate in cross-section and'is made of smaller eningof the knife.

Ielaim: 1 '1. In a slicing machine, a rotary hlifllmd means for rotating it, a guard plate. Pfli" 'tioned "on the forward side of said knifemd a guard member positioned to the rear ofmid knife, both faces of said knife being mud to receive edges of said guard plate and 1m be! respectively, the recesses In the appeals faces of the knife being concentric and of like radius. a c a 2f In a slicing machine, a rotary knife and means for rotatingit, a guard plate p0 sitioned on the forward side of saidknife and a guard member positioned to the rear of said knife, both faces of said knife being recessed to receive'edgesbfsaid guard plate and member respectively, the recesses in the opposite faces of the knife being concentric and-0f like radius, the forward face of the knife, exterior to said recess being substantially flat, the rear face being cdntinuously curved in cross-section.

3. The structure of claim 2 in combination with a scraper opposed to the said flat forward face of the knife.

Si ned at Indianapolis, countyof Marion and tate of Indiana, this 21st day of June, 1929.

WILLIAM J. CAMPBELL. V 

